* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  .iconfont {
    font-size: inherit;
    color: inherit;
  }
  ::before,
  ::after {
    box-sizing: border-box;
  }
  
  a {
    color: inherit;
    text-decoration: none;
  }
  
  body {
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
  }